\begin{figure}
\begin{center}
\includegraphics[width=15cm]{img/nicox.jpg}
\label{}
\caption{Nicola}
\end{center}
\end{figure}


\begin{figure}
\begin{center}
\includegraphics[width=15cm]{img/marcox.jpg}
\label{}
\caption{Marco}
\end{center}
\end{figure}


\begin{figure}
\begin{center}
\includegraphics[width=15cm]{img/fedex.jpg}
\label{}
\caption{Fede}
\end{center}
\end{figure}

